CN104876520B - A kind of manufacture method of powder ash air-entrained concrete building block - Google Patents
A kind of manufacture method of powder ash air-entrained concrete building block Download PDFInfo
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- CN104876520B CN104876520B CN201510189693.8A CN201510189693A CN104876520B CN 104876520 B CN104876520 B CN 104876520B CN 201510189693 A CN201510189693 A CN 201510189693A CN 104876520 B CN104876520 B CN 104876520B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
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- Y02W30/91—Use of waste materials as fillers for mortars or concrete
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Abstract
The present invention relates to a kind of manufacture method of powder ash air-entrained concrete building block, it comprises the following steps：I weighing raw material raw material proportion by weight be：Quick lime 480-560, coal ash pulp 2750-2850, cement 35-45, aluminium powder liquid 2.3-2.7；II produces mixed slurry according to coal ash pulp, cement, cementitious matter and aluminium powder blanking to mixer, adds cement and is stirred 180~220 seconds after quick lime, stirring was not less than 30 seconds after adding aluminium powder, into mixed slurry；III cast exhaust mixed slurry, which is poured into mould vehicle, to be exhausted；IV mould vehicle of resting is rested at 40~45 DEG C, into base substrate；Base substrate substep is cut in V cutting；VI steam press maintenance vacuumizes base substrate in still kettle, and pressure boosts when being not more than 0.06MPa, constant pressure during 1.1~1.2MPa of pressure, 5.5 it is small when after decompression into powder ash air-entrained concrete building block finished product.A5.0 grades of powder ash air-entrained concrete building block difficulty produced by the invention is small.
Description
Technical field
The present invention relates to a kind of manufacture method of powder ash air-entrained concrete building block, is especially A5.0 grades fly ash aerated
The manufacture method of concrete segment.
Background technology
According to national standard 11968-2006 standards, B06 grades of powder ash air-entrained concrete building blocks（Unit weight≤625kg/m3）Intensity
It is required that A3.5 grades, i.e., more than mean intensity 3.5MPa, more than minimum strength 2.8MPa.In actual building construction process, partly fill out
Filling wall needs to hang the related suspension member such as water heater, radiator, and construction party proposes requirements at the higher level to the intensity of filling materials for wall body,
Traditional B06 grades of powder ash air-entrained concrete building block cannot meet construction demand, therefore, develop A5.0 grade high-strength flyash
Air-entrained concrete building block is significant.
Construction market continues to increase A5.0 grades of powder ash air-entrained concrete building block demands, according to statistics, Taiyuan City in 2013
A5.0 grades of powder ash air-entrained concrete building block demands of powder ash air-entrained concrete filled wall account for wall and fill out in 100,000 sides or so
Fill the 5% of material.Powder ash air-entrained concrete industry market competition, develops A5.0 grades of powder ash air-entrained concretes and builds
Block can effectively lift Products competitiveness to avoid homogeneous competition in industry.A5.0 grades of powder ash air-entrained concrete building blocks
Market unit price than traditional A3.5 grades of building block is higher by 30 yuan/just, therefore, A5.0 grades of powder ash air-entrained concrete building block technological development into
For the new profit growth engine of company.
The production of A5.0 grades of powder ash air-entrained concrete building blocks need to solve technical problem：1. high strenght flyash aerating coagulation
Earth building blocks production breaks through unit weight bottleneck, and A5.0 grades of powder ash air-entrained concrete building block unit weights are difficult to control in 625kg/m3Below；
2. high strenght flyash air entrained concrete requires product to have preferable air hole structure, quality of fly ash fluctuation is big, and grain composition is poor
Different larger, the process of getting angry of resting is unstable, is also easy to produce through hole etc. and causes product intensity low；3. air entrained concrete production is generally adopted
The quick lime at a slow speed in, but quick lime, product intensity are difficult to reach 5.0MPa at a slow speed in using, is rested hair using quick quick lime
The more difficult control of gas process, A5.0 grades of powder ash air-entrained concrete building block difficulty of production are big.
The content of the invention
In order to overcome the above-mentioned deficiency of the manufacture method of existing powder ash air-entrained concrete building block, the present invention provides a kind of powder
The manufacture method of coal ash air-entrained concrete building block, the A5.0 level powder ash air-entrained concrete building blocks of this flyash manufacture method production
Difficulty is smaller, and unit weight is easy to control in 625kg/m3Below.
The present invention controls fineness of pulverized-coal ash, using modes such as the quick limes of a variety of different qualities by control, adds to improve
Gas concrete increases the content of free calcium oxide in process condition of getting angry of resting, and makes hydration reaction more abundant, so as to improve into
Product intensity.
The design of the manufacture method of this powder ash air-entrained concrete building block is the technical solution taken regarding to the issue above：①
Powder ash air-entrained concrete building block intensity depends on the degree that steam press maintenance process hydration reaction carries out, and fineness of pulverized-coal ash is to aerating
Concrete hydrating reacts important, and usually, the relatively thin hydration reaction of fineness of pulverized-coal ash is more abundant, product strength
It is higher, therefore, fineness of pulverized-coal ash is detected,, need to be to slurry after flyash slurrying as fineness of pulverized-coal ash is undesirable
Using the levigate processing of wet milk；2. the mixed slurry to being poured into mould, using Vibration Technology, carries out exhaust of vibrating, while makes to mix
It is more uniform to close slurry mixing；3. quick lime mechanical milling process by quick quick lime, arrange in pairs or groups and make by a certain percentage at a slow speed with by quick lime
With, and blending process suitably increases quick lime volume, and suitably reduce pouring temperature.
The manufacture method of this powder ash air-entrained concrete building block include it is following successively the step of：
I weighs raw material
The raw material of weighing is quick lime, coal ash pulp, cement and aluminium powder, and the proportion by weight of raw material is：
Quick lime 480-560, coal ash pulp 2750-2850,
Cement 35-45, aluminium powder liquid 2.3-2.7；
Wherein quick quick lime technical indicator：The content of free calcium oxide more than 65%, oxidation rate 5~10 minutes, resolution temperature
60~70 DEG C of degree, fineness 13%~15%（0.088mm screen over-sizes）；
In quick lime technical indicator at a slow speed：The content of free calcium oxide more than 65%, oxidation rate 15~30 minutes, resolution temperature
60~70 DEG C of degree, fineness 10%~12%（0.088mm screen over-sizes）；
In quick lime, in quick quick lime the mass ratio of quick lime is 5 at a slow speed with：（4—6）, 5：5 is best.
Cement is Portland cement.325 Portland cement effects are preferable.
The requirement of aluminium powder liquid：Aluminium powder cream amount of solid content more than 65%, active aluminium content more than 85%, aluminium powder cream and water according to
1:（6—8）Ratio be configured to aluminium powder liquid, according to 1:It is preferable that 7 ratio prepares effect.（The small aluminium powder of the ratio of aluminium powder cream and water
Stir uneven, adding proportion is excessive, and to easily cause middle control mixed slurry ratio of water to material big）；
Coal ash pulp technical indicator：22 ~ 26cm of diffusance of coal ash pulp, moisture content（Weight ratio）39% ~ 41%, fineness
25%~35%（0.045mm screen over-sizes）, the mass ratio containing desulfurated plaster is 1%~1.5%.
II produces mixed slurry
After the completion of each material metering, carried out down successively according to the blanking order of coal ash pulp-cement-cementitious matter-aluminium powder
Expect to mixer,（After flyash blanking, cement, quick lime start blanking, whole 60 ± 6 seconds blanking time）, add water
Mud after quick lime with stirring 180~220 seconds, and stirring was not less than 30 seconds after adding aluminium powder, and general 35 ± 5 seconds, total mixing time was not
Less than 6 minutes, (normally due to quick lime increases by 20~40kg in original basis), pouring temperature should reduce by 2~3 than normal condition
DEG C, control at 45 ± 1 DEG C, 15 ± 1cm of diffusance, is made mixed slurry, starts to pour into a mould blanking.
III cast exhaust
Mixed slurry is poured into mould vehicle, is exhausted and vibrated using the supporting tamping equipment of ferry bus, makes casting process
The middle air into mixed slurry is discharged as far as possible, in addition, ferry-boat operation increase Vibration Technology, mixed slurry are more uniform.
IV rests
Mould vehicle is run under the traction of friction pulley to station of resting is specified, and mould vehicle requirement operates steadily, accurate to stop
Positioning, avoids mould vehicle from mutually colliding.Resting room temperature control is poured into the mixed slurry of mould in this room temperature ring at 40~45 DEG C
To rest under border, 15 ± 3 minutes bubbling time, height of getting angry is less than 2 ± 1cm of mould vehicle,（General 2 ± 0.5cm）, rest not small
Into base substrate when 1.5 is small, when base substrate early strength reaches 0.6 ± 0.05MPa, prepare cutting.
V cutting
The base substrate for being up to cutting condition is hoisted to cleavage and carries out the upset demoulding, and substep is cut, and is observed cutting and completed
Billet surface afterwards is felt suffocated situation.Track is placed before base substrate after cutting is hoisted to kettle by loop wheel machine before kettle, is waited steam-cured into kettle.
VI steam press maintenance
Base substrate before kettle is delivered in still kettle, kettle is closed and starts to vacuumize behind the door, vacuumize 30 ~ 40 minutes, vacuum pressure
When being not more than 0.06MPa by force, start to boost, boost（100-130 minutes）Pressure rises to 1.1~1.2MPa, and 175 DEG C of temperature ~
200 DEG C, start constant pressure, when constant pressure 6 is small after（When generally constant pressure 6 ± 0.5 is small）Start to be depressured, be depressured（100-130 minutes）After press
It is strong to be down to 0, into powder ash air-entrained concrete building block finished product when whole steam press maintenance process 10.5 ± 0.5 is small.
VII performance detection
After powder ash air-entrained concrete building block finished product is placed seven days, 120 ± 20 pieces of samples are taken to carry out intensity, unit weight detection.
Powder ash air-entrained concrete building block mean compressive strength reaches 5.4MPa, and minimum strength reaches 4.7MPa, reaches national standard 11968-
2006 A5.0 grades of air-entrained concrete building block strength criterion；Volume-weighted average 596kg/m3, less than 625kg/m3, overall target reaches
A5.0, B06 high-class product standard.
From internal macrostructure, the powder ash air-entrained concrete building block stomata knot through wet milk and Vibration Technology preparation
Structure is uniform, no perforation stomata.
Say in detail, fineness of pulverized-coal ash so controls, and flyash of the invention comes from coal-burning power plant, its fineness depends on
The fineness of levigate coal dust, usual fineness of pulverized-coal ash is unstable, and fluctuating range is larger.The life of ordinary fly ash air-entrained concrete building block
Production. art requires fineness of pulverized-coal ash to reach 45%（The screen over-size of 0.045mm）Hereinafter, it is fly ash aerated mixed that A5.0 grade high-strengths are produced
Solidifying earth building blocks, need to further control fineness of pulverized-coal ash（Generally 25% ~ 35%）.
Flyash is prepared into certain density slurry（22 ~ 26cm of diffusance, moisture content 39% ~ 41%）, by Pulp pump by powder
Coal ash paste is delivered to wet milk, adjusts pulping tank discharging butterfly valve, wet milk coal ash pulp inlet amount is controlled, so as to control flyash
Fineness is starched, until fineness of pulverized-coal ash meets the requirements.
The invention has the advantages that one small grinder of increase is, it can be achieved that any fineness flyash is supplied；
It is used in mixed way using quick quick lime and quick lime at a slow speed, only need to be when quick lime mixes broken, according to fixed ratio
Example mixing；It can be achieved in ferry-boat process increase oscillating column pump using Vibration Technology, it is easy to operate；Fine coal produced by the invention
The general 5.0MPa of ash aerated concrete block strength, minimum strength reach 4.7MPa, and product can be widely used for concrete or steel knot
Filled wall inside and outside structure frame-type, since its intensity is higher than ordinary air-entrained concrete building block, when wall is filled, can reduce construction
The quantity of column or beam, so as to reduce the expenditure of construction of building.
Embodiment
With reference to the embodiment embodiment that the present invention will be described in detail, but the embodiment of the present invention is not only
It is the following examples.
Embodiment
The present embodiment include it is following successively the step of：
I weighs raw material
The raw material of weighing is quick lime, coal ash pulp, cement and aluminium powder, and the proportion by weight of raw material is：
Quick lime 520, coal ash pulp 2800,
Cement 40, aluminium powder liquid 2.5；
Wherein quick quick lime technical indicator：The content of free calcium oxide more than 65.3%, oxidation rate 8 minutes, digestion condition
65 DEG C, fineness 13.6%（0.088mm screen over-sizes）；
In quick lime technical indicator at a slow speed：The content of free calcium oxide more than 67.2%, oxidation rate 17 minutes, digestion condition
66 DEG C, fineness 11.4%（0.088mm screen over-sizes）；
In quick lime, in quick quick lime and in the quality of quick lime at a slow speed be all 260 parts.
Cement：325 Portland cements；
The requirement of aluminium powder liquid：Aluminium powder cream amount of solid content more than 65%, active aluminium content more than 85%, aluminium powder cream and water according to
1:7 ratio is configured to aluminium powder liquid；
Coal ash pulp technical indicator：The diffusance 25cm of coal ash pulp, moisture content（Weight ratio）40.7%, fineness 33.4%
（0.045mm screen over-sizes）, the mass ratio containing desulfurated plaster is 1.2%.
By taking 4.8m × 1.2m × 0.6m mould vehicles as an example, every part of quality is 1kg.
II produces mixed slurry
After the completion of each material metering, carried out down successively according to the blanking order of coal ash pulp-cement-cementitious matter-aluminium powder
Material adds cement with being stirred 200 seconds after quick lime to mixer（After flyash blanking, cement, quick lime start blanking,
The whole 60 seconds blanking time）, stirred 35 seconds after adding aluminium powder, 6 minutes total times stirred, since quick lime increases in original basis
20~40kg, pouring temperature should reduce by 2~3 DEG C than normal condition, control at 45 ± 1 DEG C, 15 ± 1cm of diffusance, is made mixing
Slurry, starts to pour into a mould blanking.
III cast exhaust
Mixed slurry is poured into mould vehicle, is exhausted and vibrated using the supporting tamping equipment of ferry bus, makes casting process
The middle air into mixed slurry is discharged as far as possible, in addition, ferry-boat operation increase Vibration Technology, mixed slurry are more uniform.
IV rests
Mould vehicle is run under the traction of friction pulley to station of resting is specified, and mould vehicle requirement operates steadily, accurate to stop
Positioning, avoids mould vehicle from mutually colliding.Resting room temperature control is poured into the mixed slurry of mould under this room temperature environment at 42 DEG C
Rest, 15 minutes bubbling time, get angry height be less than mould vehicle 1cm, rest 1.6 it is small when reach into base substrate, base substrate early strength
During 0.6MPa, prepare cutting.
V cutting
The base substrate for being up to cutting condition is hoisted to cleavage and carries out the upset demoulding, and substep is cut, and is observed cutting and completed
Billet surface afterwards is felt suffocated situation.Base substrate after cutting is hoisted to by loop wheel machine before kettle（Organized into groups before kettle）Track is placed, and is waited into kettle
It is steam-cured.
VI steam press maintenance
Will（Marshalling number）Base substrate be delivered in still kettle, close kettle start to vacuumize behind the door, 35 minutes, vacuum pressure
During 0.06MPa, start to boost, boost 120 minutes, pressure rises to 1.1MPa, 185 DEG C of temperature, starts constant pressure, when constant pressure 6 is small after
Start to be depressured, be depressured（120 minutes）Pressure is down to 0 afterwards, when whole steam press maintenance process 10.5 is small.
VII performance detection
Finished product after steam-cured places product stockyard after a week, takes 120 pieces of samples to carry out intensity, unit weight detection.After testing, pass through
The powder ash air-entrained concrete building block mean compressive strength that the coal ash for manufacturing for processing that wet milk is levigate is standby reaches 5.4MPa, minimum strong
Degree reaches 4.7MPa, reaches A5.0 grades of air-entrained concrete building block strength criterions of national standard 11968-2006；Volume-weighted average 596kg/
m3, less than 625kg/m3, overall target reaches A5.0, B06 high-class product standard.
From internal macrostructure, the powder ash air-entrained concrete building block stomata knot through wet milk and Vibration Technology preparation
Structure is uniform, no perforation stomata.
The fineness of pulverized-coal ash of the present embodiment so controls, and flyash comes from coal-burning power plant, its fineness depends on levigate
The fineness of coal dust, usual fineness of pulverized-coal ash is unstable, and fluctuating range is larger.The production work of ordinary fly ash air-entrained concrete building block
Skill requires fineness of pulverized-coal ash to reach 45%（More than 0.045mm fineness accounts for less than 45%）Hereinafter, A5.0 grade high-strength fine coal is produced
Ash aerated concrete building block, need to further control fineness of pulverized-coal ash（Generally 25% ~ 35%）.
The flyash of the present embodiment is prepared into certain density slurry（Diffusance 25cm, moisture content 40.5%）, by Pulp pump
Coal ash pulp is delivered to wet milk, pulping tank discharging butterfly valve is adjusted, wet milk coal ash pulp inlet amount is controlled, so as to control powder
Coal ash paste fineness, until fineness of pulverized-coal ash meets the requirements.
Claims (1)
1. a kind of manufacture method of powder ash air-entrained concrete building block, it include it is following successively the step of：
I weighs raw material
The raw material of weighing is quick lime, coal ash pulp, cement and aluminium powder, and the proportion by weight of raw material is：
Quick lime 480-560, coal ash pulp 2750-2850,
Cement 35-45, aluminium powder liquid 2.3-2.7；
In quick lime, in quick quick lime the mass ratio of quick lime is 5 at a slow speed with：5；Wherein quick quick lime technical indicator：
The content of free calcium oxide more than 65%, oxidation rate 5~10 minutes, 60~70 DEG C of digestion condition, fineness 13%~15%；
In quick lime technical indicator at a slow speed：The content of free calcium oxide more than 65%, oxidation rate 15~30 minutes, digestion condition 60
~70 DEG C, fineness 10%~12%；The requirement of aluminium powder liquid：Aluminium powder cream amount of solid content more than 65%, active aluminium content more than 85%, aluminium
Powder cream is with water according to 1:（6—8）Ratio be configured to aluminium powder liquid；
Coal ash pulp technical indicator：22 ~ 26cm of diffusance of coal ash pulp, moisture content weight ratio 39% ~ 41%, 0.045mm is tailed over
Measure as 25%~35%, the mass ratio containing desulfurated plaster is 1%~1.5%；
The fineness for weighing the coal ash pulp in raw material so controls, and flyash is prepared into certain density slurry, diffusance
22~26cm, moisture content 39%~41%, wet milk is delivered to by Pulp pump by coal ash pulp, adjusts pulping tank discharging butterfly valve, control
Wet milk coal ash pulp inlet amount processed, so as to control coal ash pulp fineness, 0.045mm screen over-sizes are 25%~35%；
The cement is 325 Portland cements；Aluminium powder cream is with water according to 1:7 ratio is configured to aluminium powder liquid；
II produces mixed slurry
Carry out blanking to mixer according to the blanking order of coal ash pulp-cement-cementitious matter-aluminium powder successively, add cement with
Stirred 180~220 seconds after quick lime, not less than 30 seconds, stirring total time was no less than 6 minutes for stirring after adding aluminium powder, cast temperature
At 45 ± 1 DEG C, 15 ± 1cm of diffusance, is made mixed slurry for degree control, starts to pour into a mould blanking；
III cast exhaust
Mixed slurry is poured into mould vehicle, is exhausted and vibrated using the supporting tamping equipment of ferry bus, make in casting process into
The air entered in mixed slurry is discharged as far as possible, and mixed slurry is uniform；
IV rests
Mould vehicle is run to station of resting is specified, and resting room temperature control is poured into the mixed slurry of mould herein at 40~45 DEG C
Rest under room temperature environment, 15 ± 3 minutes bubbling time, height of getting angry is less than 2 ± 1.0cm of mould vehicle, when resting small not less than 1.5
Into base substrate, when base substrate early strength reaches 0.6 ± 0.05MPa, reach cutting condition；
V cutting
Base substrate is hoisted to cleavage and carries out the upset demoulding, substep is cut, and track is placed before the base substrate after cutting is hoisted to kettle；
VI steam press maintenance
Base substrate before kettle is delivered in still kettle, kettle is closed and starts to vacuumize behind the door, vacuumize 30~40 minutes, vacuum pressure is not
During more than 0.06MPa, starting to boost, boost 100~130 minutes, pressure rises to 1.1~1.2MPa, 175 DEG C ~ 200 DEG C of temperature,
Start constant pressure, when constant pressure is small not less than 5.5, start to be depressured, be depressured 100-130 minutes, pressure is down to 0, whole steam press maintenance mistake
When journey 10.5 ± 0.5 is small, into powder ash air-entrained concrete building block finished product；
VII performance detection
After powder ash air-entrained concrete building block finished product is placed seven days, 120 ± 20 pieces of samples are taken to carry out intensity, unit weight detection；Fine coal
Ash aerated concrete building block mean compressive strength reaches 5.4MPa, and minimum strength reaches 4.7MPa, reaches national standard 11968-2006
A5.0 grades of air-entrained concrete building block strength criterions；Volume-weighted average 596kg/m3。
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| CN105271994A (en) * | 2015-10-12 | 2016-01-27 | 吴江市范氏新型建材制品有限公司 | Autoclaved aerated lime brick and preparation method thereof |
| CN105967614A (en) * | 2016-05-09 | 2016-09-28 | 中石化重庆涪陵页岩气勘探开发有限公司 | Method for preparing non-autoclaved aerated concrete blocks by using oil-based drill cutting residues |
| CN106187295A (en) * | 2016-07-04 | 2016-12-07 | 吉林建筑大学 | The powder ash air-entrained concrete building block of a kind of low heat conduction and production method |
| CN107132075A (en) * | 2017-04-28 | 2017-09-05 | 中铁二局集团有限公司 | A kind of quick discrimination method of marching into the arena of concrete flyash |
| CN108101487A (en) * | 2017-12-29 | 2018-06-01 | 甘肃润源环境资源科技有限公司 | It is a kind of to utilize concrete segment of high-calcium fly ass production and preparation method thereof |
| CN115215622A (en) * | 2021-04-16 | 2022-10-21 | 河南新时代建材有限公司 | Application method of furnace slag in aerated concrete block production |
| CN113370369B (en) * | 2021-07-19 | 2023-02-03 | 赖世成 | Method and equipment for applying low-pressure superheated steam to aerated concrete steam curing |
| CN113620646B (en) * | 2021-08-17 | 2022-05-20 | 内蒙古汇方新型建材有限公司 | High-alumina fly ash self-insulation autoclaved aerated concrete block and preparation method thereof |
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| CN103396071A (en) * | 2013-08-08 | 2013-11-20 | 太原钢铁(集团)有限公司 | Manufacturing method of aerated concrete building block |
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| CN103396071A (en) * | 2013-08-08 | 2013-11-20 | 太原钢铁(集团)有限公司 | Manufacturing method of aerated concrete building block |
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